The Secp256r1 elliptic curve is extensively utilized in web2 infrastructures such as Secure Enclaves, Ubikeys, DSL, TSS, among others. However, its onchain verification remains cost-prohibitive. Although EIP 7212 proposes a financially viable and secure method for its verification, its implementation confronts a classic causality dilemma. To integrate EIP 7212 into the mainnet, a cheap verification method must be found.